Grate-bar



(No Model.)

G. W. WALKER. GRATE BAR Patented Sept. 6, 1881.

NITEADE STATES PATENT Qrntcnn GEORGE WV. WALKER, OF MALDEN, MASSACHUSETTS.

GRATE-BAR.

SPECIFICATION forming part of Letters Patent No. 246,645, dated Semptember 6, 1881.

Application filed June 6, 1881.

To all whom it may concern:

Be it known that I, GEO. W. WALKER, of Malden, county of Middlesex, and State of Massachusetts, have invented a new and useful Improvement in Grate-Bars, of which the following description, in connection with the accompanying drawings, is a specification.

This invention relates to grate-bars, and is shown embodied in a dumping-grate.

The object of my invention is the production of a grate all the grates of which may be vibrated independently by cams,the said gratebars being pivoted upon a rod supported in the dumping-frame at or near its center Each grate-bar at its outer or movable end is guided by suitable combs or teeth forming part of the dumping-frame. The shaft which carries the cams for operating the grate-bars serves also as a supporting and trunnion shaft for the dumping-frame,'thus making my improved grate-bar applicable to any furnace, in place of the usual grate-bar of substantial] y the same shape. Each of my improved grate-bars is extended only a part of the way across the dumping-frame, and is pivoted at its inner end, so that when a downward projection ofthe gratebar is acted upon by a cam the outer end of the grate-bar will be raised and lowered rapidly. Adjacent grate-bars are provided with projections and shoulders to prevent the grate-bars leaving the notches or combs of the dumpingframe when the latter isturned over.

Figure 1 represents, in top view, a grate and dumpin gframe embodying myinvention; Fig. 2, a section on the dotted line as as, Fig. 1. Fig. 3 is a partial side elevation of the dumpingfrarne. Fig. 4 is a front end elevation of the dumping-frame, and Fig. 5 is a side elevation of the cam-shaft.

In the drawings, Arepresents the dumping- (N0 model.)

its ends. The grate-bar b has a downwardlyprojecting finger or arm, I), and the shoulder cam-projections c, more or less in number, and.

arranged, as shown in Fig. 5, on the shaft 6 the front end of which is squared, as at 6 to receive the usual wrench or handle with which to rotate the said shaft 0 to vibrate the-gratebars, and also to turn over the dumpingframe. As the shaft 6 is rotated in the direction of the arrow, &c., Fig. 2, the cam-projections will strike against the portions 6 of the grate-bars c, and the portions 7 of the grate-bars b will move them so as to elevate the outer ends of the grate-bars, and as the cams pass the shoulders b c the grate-bars, by their own gravity and the weight of the fuel upon them, will drop.

The left-hand end of the shaft 6 serves as the journal for the dumping-frame, and the neck 8 of the righthand end of the said shaft, (see Fig. 1,) which in practice will be from two to three inches in length, serves as a journal to fit a proper bearing to sustain the front part of the dumping-frame. When it is desired to tip over the dumping-frame the shaft 6 will be turned in the direction opposite the arrow, Fig. 2, when the cam-projections 6 will strike squarely against the shoulders c and b and will turn the dumping-frame over toward the left, as herein shown, the frame being capable of being turned over only in that direction. As described, it will be understood that this shaft 6 serves the purpose of the journal for the dumping-frame, and is provided with cams by which to vibrate the grate-bars when the shaftis turned in one direction,and the gratebars are so shaped that when the said shaft is turned in the opposite direction the cams thereon, operating against the shoulders of the grate-bars, will turn the dumping-frame over.

Each grate-barbhas a projection, m, to strike against a shoulder, 10, of the grate-bar c in line with it, and each grate-bar c has a similar projection, on, to engage a shoulder, 12, of the grate-bar bin line with it, so that when the dumping-frame is turned over the said projections meet the said shoulders and prevent the grate-bars turning so far upon the rod 0 as to permit the ends of the grate-bars to leave the notches between the fingers or projections 3 of the dumping-frame A.

The cap a at the front end of the dumpingframe serves as a cover to retain the shaft 8 in its bearing in the dumping-frame. This cap a, as shown in Fig. 4, is hooked at one end to engage a lug, f, of the dumping-frame, and at its other end the cap has a leg to enter a socket of the dumping-frame, the leg being secured in the said socket by means ofa pin, o,extended therethrough, as shown in the said figure.

These grate-bars, fixed at their inner ends substantially at or near the longitudinal center of the dumping-frame; are vibrated up and down at their outer ends, moving only at the said outer ends.

I do not broadly claim a grate-bar mounted loosely in a dumping-frame so that each end of the grate-bar may be moved up and down by means of cams on an independent shaft other than that which serves as the journals for the dumpin g-frame.

I claim 1. The combination, with the frame, of gratebars b c, pivoted at their inner ends, and acamshaft to operate upondownwardly-extended portions of and vibrate the said grate-bars about their pivotal point, substantially as described.

2. The pivoted grate-bar provided with a downwardly-projecting arm, shouldered as described, combined with a dumping-frame and with a cam-shaft which, turned in one direction, will vibrate the said grate-bar, and in the other direction will turn over the dumpingframe, substantially as described.

3. The dumping-frame provided with the fingers or projections 3 to receive the grate-bars, combined with the independent grate-bars b 0, having their inner ends pivoted substantially at the center of the dumping-frame, as setforth.

4. The frame, its rod d, and the series of gratebars I) c, the bars I) being substantially in line with the series of grate-bars 0, one grate-bar I) being at one side of the frame, while a gratebar 0 is at the opposite side of the frame, in line with it, substantially as described.

5. The dumping-frame, its cam-shaft, and rod (1, combined with the series of grate-bars b 0, provided with projections ma and shoulders 12 10, to operate substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two sub scribing witnesses.

GEO. V. WALKER. Witnesses G. W. GREGORY, BERNIOE J. NoYEs. 

